WordPress-数据库FIND_IN_SET

Question

I have data in post_content of table - wp_posts like this :

[["ROLL NO.","SID NO","N A M E","M/F"],
["1","1801031101","K. NISHA GOVIND","F"],
["2","1809031101","PATEL RAJ DIRAJ","M"],
["3","1801031901","SHARMA CHARMI J","F"],
["4","1891031101","PATEL HIRAL J","F"],
["5","1801031301","SHAH BRIJESH V","M"],
["6","1801031709","PAREKH HITESH R","M"]]

Now I want to compare SID NO and tried it like :

Option 1:

$results_match_roll = $wpdb->get_results('SELECT * FROM '.$table_name.' WHERE find_in_set('.$rollNumber.', post_content) '); 

Option 2:

$results_match_roll = $wpdb->get_results('SELECT * FROM wp_posts WHERE post_content LIKE '%$rollNumber); 

But no luck. Please guide me through.

Answer 1

The FIND_IN_SET finds the values separated by comma. Since your SID NO has " you need to check like below. That is include double quote before and after of SID NO .

$results_match_roll = $wpdb->get_results("SELECT * FROM $table_name WHERE find_in_set('\"$rollNumber\"', post_content) ");